Basic Structure and Principle (1) The high-pressure reactor consists of a reaction vessel, agitator and transmission system, cooling device, safety device, heating furnace, etc.
1. The kettle body and kettle cover are made of 1Cr18Ni9Ti stainless steel processing. The kettle body is connected to the flange through threads, and the kettle cover is a flat body cover. The two are connected by uniformly distributed main bolts and nuts in a circumferential direction.
2. The main sealing port of the high-pressure vessel adopts A-type double line sealing, and the other sealing points are sealed in a form of line contact between the arc surface and the plane, and between the arc surface and the arc surface. By relying on the high precision and smoothness of the contact surface, a good sealing effect is achieved.
3. There is a barrel shaped silicon carbide furnace core installed outside the kettle, and the electric furnace wire is threaded into the furnace core. Its end is threaded out from the lower part of the furnace shell side and connected to the controller through wiring screws and rubber sheathed cables.
4. The kettle cover is equipped with a pressure gauge, bursting disc safety device, vapor-liquid phase valve, temperature sensor, etc., which facilitates understanding of the reaction situation inside the kettle at any time, adjusting the proportion of medium inside the kettle, and ensuring safe operation.
5. The coupling is mainly composed of a pair of inner and outer magnetic rings with strong magnetic force, with a pressure bearing spacer in the middle. The mixer is driven by a servo motor through a coupling. By controlling the speed of the servo motor, the purpose of controlling the stirring speed can be achieved.
6. The upper part of the spacer is equipped with a speed measuring coil. When the agitator connected to the inner magnetic ring rotates, the speed measuring coil generates an induced electromotive force, which corresponds to the stirring speed. This electromotive force is transmitted to the tachometer to display the stirring speed.
7. There is a cooling water jacket installed between the magnetic coupling and the kettle cover. When the operating temperature is high, cooling water should be used, and demagnetization should be carried out due to the high temperature of the magnetic steel.
8. The bearings are made of 1Cr18Ni9Ti stainless steel or high-strength electroplated graphite, which is wear-resistant and has a long maintenance cycle
（2） Controller
1. The shell adopts a standard aluminum alloy chassis, and the upper cover can be pulled out backwards for easy maintenance and repair. The panel is equipped with a temperature digital display meter, voltmeter, tachometer, as well as control switches and adjustment knobs for operators to operate and use.
2. Electrical principle: The electronic components of the mixing control circuit are assembled on a single circuit board and adopt a dual closed-loop control system, which has the characteristics of high speed regulation accuracy, stable speed, strong anti-interference ability, and complete protection functions such as limiting overspeed and overcurrent. Adjusting the "speed regulation" knob can change the DC voltage of the DC motor, thereby changing the motor speed and achieving the purpose of controlling the mixing speed.
3. Solid state relays (commonly known as voltage regulating blocks) are used in the heating circuit to simplify the heating circuit. The heating power can be adjusted by simply adjusting the "voltage regulating" knob. At the same time, the control part of the heating circuit is equipped with an intelligent digital display meter, allowing the heating temperature to be adjusted according to the process requirements, and the temperature control accuracy is extremely high (see the temperature meter user manual for details) All external leads are led out from the wiring terminals inside the controller through waterproof joints on the rear panel.
2、 Installation and Use
1. The high-pressure vessel should be placed indoors. When equipping multiple high-pressure kettles, they should be placed separately. Each operating room should have a direct exit to the outside or passageway, ensuring good ventilation at the equipment grounding point.
2. When installing the kettle cover, it is necessary to prevent the sealing surfaces between the kettle body and cover from colliding with each other. Carefully place the kettle cover in the fixed position on the kettle body. When tightening the main nut, it must be tightened diagonally and symmetrically in multiple stages. Apply force evenly and do not allow the kettle cover to tilt to one side to achieve a good sealing effect.
3. At the connection between the front and back nuts, only the front and back nuts can be rotated, and the sealing surfaces of the two arcs must not rotate relative to each other. When all nut pattern connecting parts are assembled, lubricating oil should be applied.
4. Needle type valve line sealing can achieve a good sealing effect by gently rotating the valve needle and pressing the cover tightly.
5. Rotate the rotating body on the kettle by hand and check for flexible operation.
6. The controller should be placed flat on the operating table, with a working environment temperature of 10-40 ℃ and a relative humidity of less than 85%. The surrounding medium should not contain conductive dust or corrosive gases.
7. Check whether the movable parts and fixed contacts on the panel and rear panel are normal, remove the upper cover, check whether the connector contacts are loose, and whether there is any damage or rust caused by poor transportation and storage.
8. The controller should be reliably grounded.
9. Connect all wires, including power lines, furnace wires between the controller and the kettle, motor wires, temperature sensor and speed sensor wires.
10. Turn on the power and air switch on the panel, and the digital display should display.
11. Set various parameters on the digital display table (such as upper limit alarm temperature, working temperature, etc.), then press the "heating" switch to turn on the electric furnace, and the indicator light on the "heating" switch will light up. Adjust the "pressure adjustment" knob to adjust the heating power of the electric furnace.
12. Press the "Mixing" switch, the mixing motor is powered on, and the indicator light on the "Mixing" switch is on. Slowly turn the "Speed Control" knob to make the motor rotate slowly. Observe whether the motor is rotating forward. If there is no error, stop the machine and hang the belt before restarting.
13. After the operation is completed, it can be cooled naturally, cooled with water, or placed above the bracket for cooling. After the temperature drops, release the pressurized gas inside the kettle to reduce the pressure to normal pressure (the pressure gauge shows zero), then symmetrically and evenly loosen the main nut, remove the main nut, and carefully remove the kettle cover and place it on the bracket.
14. After each operation, the residue on the kettle body and lid should be removed. The main seal should be cleaned regularly and kept clean. It is not allowed to wipe with hard objects or rough surfaces. At present, industries such as chemical, food, and pharmaceutical require reactor equipment. However, the manufacturing structure of reactors is constantly being improved to facilitate customer use. However, it is difficult to attract customer attention to the use of high-pressure reactors.